//--------------------------------------------------------------------------------------------------
public static bool RenderEdges(IDrawingRenderer renderer, List <TopoDS_Edge> edges, TopoDS_Face face)
{
var res = true;
// Order edges
var order = new ShapeAnalysis_WireOrder(true, 0.0001);
foreach (var edge in edges)
{
var first = BRep_Tool.Pnt(TopExp.FirstVertex(edge));
var last = BRep_Tool.Pnt(TopExp.LastVertex(edge));
if (edge.Orientation() == TopAbs_Orientation.TopAbs_FORWARD)
{
order.Add(first.Coord, last.Coord);
}
else
{
order.Add(last.Coord, first.Coord);
}
}
order.Perform(true);
if (order.IsDone())
{
order.SetChains(0.0001);
for (int chain = 1; chain <= order.NbChains(); chain++)
{
int startIndex = 0, endIndex = 0;
order.Chain(chain, ref startIndex, ref endIndex);
if (startIndex > endIndex)
{
continue;
}
// Process ordered edges
renderer.BeginPathSegment();
for (int index = startIndex; index <= endIndex; index++)
{
int orderIndex = order.Ordered(index);
int originalIndex = Math.Abs(orderIndex) - 1; // order index is 1-based
res &= RenderEdge(renderer, edges[originalIndex], orderIndex < 0, face);
}
renderer.EndPathSegment();
}
}
else
{
// Cannot sort, just pump out all edges
foreach (var edge in edges)
{
res &= RenderEdge(renderer, edge, false, face);
}
}
return(res);
}
//--------------------------------------------------------------------------------------------------
public static void RenderArrow(IDrawingRenderer renderer, Ax2d location, double scale = 1.0)
{
var arrowSize = GetArrowSize();
var p1 = location.Location;
var backpoint = p1.Translated(location.Direction.Reversed().ToVec(arrowSize.Length * scale));
var rightVec = new Vec2d(location.Direction.Y, -location.Direction.X).Scaled(arrowSize.Width * 0.5 * scale);
var p2 = backpoint.Translated(rightVec);
var p3 = backpoint.Translated(rightVec.Reversed());
renderer.SetStyle(null, new FillStyle(Common.Color.Black), null);
renderer.BeginPath();
renderer.BeginPathSegment();
renderer.Line(p1, p2);
renderer.Line(p2, p3);
renderer.Line(p3, p1);
renderer.EndPathSegment();
renderer.EndPath();
}
